How to fix my phone which is stuck on fastboot mode

after 2 years my device started to run slow, so i decided to install a new rom. By doing so i needed to install a new recovery witch was ClockworkMod Recovery (CWM) . After installation it stated that i must reboot my device, after a few seconds it rebooted into fastboot and rescue mode. i was unable to start my device or get back into recovery mode . MY PHONE WAS STUCK .

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boot loop - Huawei p9 lite VNS-L31 Bricked after update

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stuck on fast reboot

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Huawei Ascend G7

How to fix my phone which is stuck on fastboot mode

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